Extend JpaExecutor.executeOutboundJpaOperationOnPersistentMode() so that it calls JpaOperations.deleteInBatch() when the payload is an Iterable

[swiss-chris]

Expected Behavior

When I run the following code:

    .transform((p, h) -> p.getIterableOfPersistedEntities())
    .handle(Jpa.updatingGateway(entityManagerFactory).persistMode(DELETE))

I expect a bulk deletion of these entities that were read from my DB.

Current Behavior

When I run the code above, I get the following exception:

Caused by: java.lang.IllegalArgumentException: Unknown entity: java.util.ArrayList
	at org.hibernate.internal.SessionImpl.fireDelete(SessionImpl.java:910)
	at org.hibernate.internal.SessionImpl.delete(SessionImpl.java:836)
	at org.hibernate.internal.SessionImpl.remove(SessionImpl.java:3271)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:311)
	at com.sun.proxy.$Proxy115.remove(Unknown Source)
	at org.springframework.integration.jpa.core.DefaultJpaOperations.delete(DefaultJpaOperations.java:54)
	at org.springframework.integration.jpa.core.JpaExecutor.executeOutboundJpaOperationOnPersistentMode(JpaExecutor.java:456)

Context

As mentioned by @artembilan in this answer https://stackoverflow.com/a/68744857/349169, JpaExecutor.executeOutboundJpaOperationOnPersistentMode() could simply call JpaOperations.deleteInBatch() when the payload is an Iterable.

[artembilan]

This is a simple fix and no breaking change, so I consider it for including into the next point version.

Thanks